package com.shengruan.common;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class CheckUserFilter implements Filter {
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		HttpSession session = request.getSession();
		Object obj = session.getAttribute(Constants.USER);
		if (obj == null) {
			request.setAttribute(Constants.MESSAGE, "非法访问,请登录!");
			response.sendRedirect("/login-load.ac");
		} else {

			chain.doFilter(request, response);

		}
	}

	public void init(FilterConfig filterConfig) throws ServletException {
	}

	public void destroy() {
	}
}
